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- Core Naming Meaning
| Part | Name | Detailed Explanation |
| SINAMICS | Siemens Drive System Brand | Siemens product series for inverters / servo drives in industrial automation, covering a full range of drive solutions from low‑voltage to high‑voltage and standard to high‑performance. |
| G120C | Compact Standard‑Performance Inverter | G120: Standard‑performance general‑purpose inverter platform |
| C: Compact, distinguishing it from other G120 variants (e.g., G120P for pumps and fans) | ||
| Features: small size, high integration, full functions, power range 0.55 kW ~ 132 kW, suitable for general industrial applications. | ||
| PN | PROFINET Communication Interface | P: PROFIBUS / PROFINET family |
| N: Ethernet | ||
| Indicates the inverter integrates a PROFINET IO industrial Ethernet communication module, supporting real‑time data exchange, remote control and diagnostics; standard for Siemens industrial automation networks. |
- Core Features of G120C PN
- Hardware & Performance
Voltage class: 3‑phase 380~480 V (+10% / -20%), frequency 47~63 Hz
Overload capability: 150% of rated current for 3 seconds, meeting most industrial load requirements
Integrated components: built‑in Class A EMC filter, input reactor, braking unit (selected models)
Protection degree: IP20 (cabinet installation), seven frame sizes for different power ratings
- PROFINET Communication Advantages
Supports PROFINET IO RT (Real‑Time) communication with cycle times down to milliseconds
Compatible with EtherNet/IP for easy integration with PLCs of other brands
Supports standard telegrams (e.g., Telegram 1 PZD2/2) and technology objects, simplifying programming
Fast configuration and diagnostics via TIA Portal software
Supports safety communication (PROFIsafe) for functions like Safe Torque Off (STO)
- Application Scenarios
General machinery: pumps, fans, compressors, conveyors and other continuous‑duty equipment
Material handling: cranes, conveyors, packaging machinery
Industrial automation: auxiliary production line equipment, special machinery
Retrofit projects: replacing traditional contactor control or old inverters to improve efficiency and control accuracy
- Differences from Other Versions
| Model | Communication Interface | Main Features | Typical Applications |
| G120C PN | PROFINET | High network integration, ideal for Industry 4.0 and smart manufacturing | Automated production lines, multi‑device networked control |
| G120C DP | PROFIBUS DP | Traditional industrial fieldbus, good compatibility | Legacy system retrofits, applications with low real‑time requirements |
| G120C | No built‑in fieldbus | Basic version; communication can be added via expansion modules | Standalone control, cost‑sensitive applications |
- Typical Application Examples
- Fan control with S7‑1200/1500 PLC + G120C PN: Real‑time communication between PLC and inverter via PROFINET to adjust fan speed, enabling energy‑saving control and status monitoring.
- Multi‑inverter synchronous control: Multiple G120C PN units connected via PROFINET for speed or position synchronization, used in packaging lines, printing machines, etc.
- Remote diagnosis and maintenance: Remote access to inverter parameters and status monitoring via PROFINET to reduce downtime.
Siemens SINAMICS G120C PN is a compact, standard‑performance inverter with integrated PROFINET communication from Siemens. It combines small size, full functionality and high‑performance network communication, making it an ideal choice for general drive control in industrial automation – especially applications requiring networked control and remote monitoring.
